Valve



W. A. SHHVIP.

VALVE.

APPLICATION FILED MAY 11. 1918.

1 ggggmg, Patented May 4, 1920..

i W 4 s m ti'gw a; 216

WILLIAM A. SH-IMP, OF- MINNEAPOLIS, MI.|\.T1 TES0'l[-A.

VALVE.

Specification of Letters Patent.

Patented May 4, 1920.-

Application filed May 17, 1918. Serial'No. 235,179.

To allwhom it may concern.

Be it known that I", WILLIAM A. SHIMP, a citizen of the United States,residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Valves;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skllled in theart to which it appertains to make and use the same.

My invention has for its object to provide an improved valve of theso-called' gate valve type; and" to such endsygenerally stated, theinvention consists of the novel devices and combinations of deviceshereinafter described and d'efined in the claims.

The invention is-illustrated' in the accompanying drawings wherein likecharacters indicate like parts throughout the several views. Referringto-the drawings,

Figure 1 is a plan view of the improved valve mechanism;

Fig. 2 is a side elevation of tlie'same;

Fig. 3 is a section on the line 3--3 of Fig. 1; j v

Fig. 4 is a section on the line l'4 of Fig. 1; and

Fig. 5 is a plan view of'the valve mechanism with the top plate of thecasing removed and showing the valve in its open position.

The valve casing is made up of a pair of vertically or laterally spacedplates 6 which have segmental marginal spacing flanges 7 through whichscrews 8, or the like, are passed and rigidly connected to said twoplates. The inner surfaces of the said plates 6 are ground or turned,preferably, flat and are parallel to each other and there is a marginalopening between the points marked 7' and 7* on Fig. 5, this openingbeing formed by termination of the spacing flanges 7 at the pointsnoted. The upper and lower plates 6 are formed with axially alinedsleeves 9 that afford alined passages between the two plates.

Working between the two plates 6 is a flat faced valve of the gate valvetype made up of a main valve plate 10 and a supplemental valve plate 11.The main plate 10 has a projecting arm 12 that extends outward from thecasing plates 6, working freely between the terminal points 7 and 7 b ofthe flanges 7 and, as shown, is provided with projecting stop lugs 13for engagement with the ends of the said flanges. .The'supplementalvalve plate 11 is-set' into the=main plate 10 flush with the same andthe two plates are pivotally connected by a screw 14 to the casingplates 6. The axisof the stud 14 is at the axis of. the spacing flanges7 and the passage 9" through the sleeves 9 is, of course, eccentric tothe said pivot and is located between the said pivot and the flanges 7.Also it will be noted (see Fig. l) that the supplemental plate 11 isformed with a port 15 and a surrounding alining sleeve 16, which latterextends through the main valve plate 10; A small bushing 17 is extendedthrough the two plates 1'0-and' 11 and immediately surrounds the-stud14-, and. said stud (see Fig. 3) is extended through the casing plates6, and has a head: that engages the upper member and has screw-threadedengagement with the lower member, so that it also assists in holdingtthecasing plates together. By means of the bushing 17, and sleeve flange16, the two valve plates are held for common oscillatory movements, butare free for slight latoral or intermediate movements. A plurality ofshort coiled springs 19 are set into countersunk seats 20 of the twoplates 10 and 11 and tend to separate the said plates" and serve to keepthe upper surface of the upper plate 11 tightly engaged with the lowersurface of the upper plate 6 and the lower surface of the plate 10tightly engaged with the upper surface of the lower plate 6. Thus,fluid-tight joints are afforded between the flat smooth surfaces of thecase plates 6 and valve plates 10 and 11. This valve will, therefore,always maintain tight joints. The wear will be very slight, but suchwear as may take place will be taken up or compensated for by thesprings 19.

It is desirable for the operator of the valve at all times to know justto what extent the valve port is opened, and hence, I provide arelatively fixed graduated segmental indicator scale or bar 21 which issecured at its ends to one of the casing plates 6, being, as shown,secured to the upper member thereof; and for cooperation with the saidgraduated scale, the projecting arm, 12 of the valve proper is providedwith a pointed finger 22 that works over the said graduated scale.

Fig. 1 shows the valve moved into a position to close the fluid passage9 of the valve casing, and Fig. 5 shows the valve set in position toopen the said fluid passage. The valve plates 10 and 11, preferably havesegmental marginal portions that directly engage with the interior ofthe segmental spacing flan 7 but this is not absolutely essential. esprings 19 should be so distributed around the pivot 14 as to evenlypress the valve plates 10 and 11 against the cooperating surface of thebase plate.

A valve of this character .may be used in a great many different places.It is especially desirable where the flow of liquid, such as milk orcream, for example, is to be handled, but more generally stated, it isserviceable wherever the flow of liquid is to be quickly started andquickly cut off by simple oscillation of the valve, and where, ofcourse, it is desirable that the valve be kept always tight withoutrequiring grindin or other repair.

oreover, the valve is especially adapted for use in handling liquidsthat vary in temperature. For example, in handling milk and cream increameries, where it is pasteurized, the temperature will vary a greatdeal and sometimes it will be desirable to run the milk and creamthrough cold. This valve will automatically compensate for expansion andcontraction due to the varyin temperature of the above or any other eange in conditions.

\Vhat I claim is:

1. The combination with a valve casing having flat parallel surfaces andalined fluid passages, of a two-part valve engaging the parallelsurfaces of said casing and pivoted thereto at a point eccentric to thefluid 2. A valve mechanism comprising a pair of case plates separated bya se mental mar ginal flange and having alined fluid passages locatedeccentric to the axis of the inner surface of said segmental flange, apair of valve plates pivoted to said case plates at the axis of saidflange thereof and provided with a port movable into and out ofalinement with the fluid passages of said case plates, one of said valveplates having a radially projecting arm working in the gap between theextremities of said segmental spacing flange, yielding means tending toseparate said valve plates and pressing the, same into fluid tightengagement with the cooperating surfaces of said case plates, asegmental scale attached to one of the case plates and spanning thespace between the extremities of said spacing flange, and cooperatingscale pointer on the radially projecting arms of said valve.

In testimon whereof I affix my signature in presence 0 two witnesses.

WILLIAM A. SHIMP.

Witnesses:

CLARA DEMAREST, F. D. MERCHANT.

